Adding-machine



(No Model.) 2 Sheets-Sheet 1.

A. K. BARMORE.

ADDING MACHINE.

Patented Feb. l2, 1884.

ATTORNEYS.

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(No Model.) 2 Sheets-Sheet 2.

A. K. BARMGRE.

ADDING MACHINE. No. 293,399. Patented Feb. 12, 1884.

bx WITNESSES: INNBNTON: @wf/@#1 l BY www ATTORNEYS.

-UNITED STATES PATENT OFFICE..

ALBERT KING BARMOBE, OF BENTON, TEXAS.

ADDING-MACHINE.

SPECIIEICATIOIN forming` part of Letters Patent No. 293,399, dated February 12, 1884.

Application filed September 13, 1883. (No model.)

T all whom may concern:

Be it known that l, ALBERT KING BAE- `MORE, a citizen of the United States, residing at Benton, in the county of At-ascosa and State of Texas, have invented a new and useful Improvement in Adding-Machines, of which the following is a specification.

This invention relates to that class of adding-machines in which a wheel provided with teeth is actuated by the operator to advance at each movementas many teeth as there are units added by that movement.

The object of the invention is to provide means for adding columns of iigures by machinery; and it consists in the construction and combination of parts forming an adding-machine, hereinafter described and claimed.

Figure l is a front elevation of my invention. Fig. 2 is a longitudinal vertical section at fr of Fig. 3, which is a side elevation with the side covering removed 5 and Fig. 4 is a plan view of the same.

A is a ratchet-toothed wheel, having one hundred teeth. Itis journaled at its center by means of a shaft, a, bearing in the front and rear sides of the case B.

G is an arm journaled upon the same shaft, a, to carry a spring-pawl, c, always in the same relation to the teeth, in order that it may be always ready to engage them. vThe arm C is connected by a rod, D, to a lever, E, which is pivoted to the frame at b. This arm has upward movement to rotate wheel A nine teeth or less by means of arm C and pawl c. The weight of parts C D E tending to return lever E to a position of rest on the frame is assisted by a spring acting between arm C and the frame B. Lever E is operated by means of levers or digits G, pivoted at g near their centers, so as to balance thereon, the forward ends of said digits being pressed down by the ngers of the operator, one at a time. The digits are plainly numbered from l to 9. Digit l, when pressed down, raises lever E,

f carrying pawl c and the wheel engaged thereby one tooth, and a spring-pawl, d, located at any convenient part of the circle of Wheel A,

retains it, the lever E and digit l returning to their normal positions as soon as the operators finger is removed. ln the same manner the pressing down of any digit advances the wheel the number of teeth corresponding to the numeral of that digit. Each digit is provided with an adjustable stop-screw, j', xed in the frame, against which screw the top side of the rear end of that digit abuts at every movement, thus preventing it from moving the wheel more teeth than are due to its numeral. The adjustability of the screw is for the purpose of preventing a tooth being moved a fraction of a tooth-space too little or too much.

His an index hand or pointer fixed upon the out end of shaft a, to rotate over a dial, I, which is divided into one hundred equal spaces, marked from 1 to 100. As a matter of convenience in reading, the decimal places are left blank in the circle of numerals, and the decimal numerals are placed on an inner circle opposite said vacant spaces. Now, suppose digits 7 and 9 to be in turn pressed down, sixteen teeth of a wheel, A, will have been moved past a given point, and pointer H will stand at 16 on the dial, showing the sum of the addition, and soon with any set of numbers added together, not to exceed 100 in amount. I und that a single ledger-column very seldom amounts to 200. Therefore I have not thought it worth the extra expense to adapt any particular means of registering the number of revolutions of the pointer, as each revolution represents 100; yet l show two methods of making such registry. Let shaft a be provided with a small pinion-wheel, 71 of, say, ten leaves. Let it engage a spur-wheel, z', journaled to the dial, having any number of teeth of which said ten is a multiple-say one hundred. Let said spur-wheel have an index marked l 2 3, &o., for each ten teeth passed over. Thus the figures will indicate the number of revolutions of the wheel, and consequently stand for the hundreds of the sum added.

To add a column of figures the operatorhas only to press down the digit corresponding to each figure of the column, and the sum will be indicated on the two dials. Supposing the iigures to be added stand in two or more columns-as units, tens, hundreds, &c.-and that the sum of the iirst or right-hand column is IOO 145. XVe set down the 5, and instead of attempting to remember or to add in the'leLO, I have provided means for instantly adjusting the dial to proceed With the next column, as follows: The dial I is free to rotate upon shaft a, and is held in any desired position by means of a button or simi-lar fastener, j, on the frame clamping the edge of the dial to the frame. Having set down the 5 units, as stated, loosen the dial and turn it till the pointer indicates 14; then clamp the dial and proceedto add to this the column of tens. Suppose the sum to be 96. Set down the G as tens :to the left ofthe 5 and reset the dial with the index at 9, and proceed in this manner until the figures are all added, when 'the last sum indicated on the dial is set at the left of the other figures, giving the correct result.

By means of my temporarily-'fixed dial I am able first to readthe result of one addition, and then to quickly adj ust the dial to the position of the index-pointer, either to the 0 point or to the number to be carried, as stated, so as to proceed with another addition from that point Without disengaging any gean Wheels or turning back the index.

Vhat I claim as my invention, and Wish to secure by Letters Patent, is-

l. The combination, with a toothed wheel fixed on a shaft to rotate in a frame, of a dial having indices corresponding to the number ofteeth in said Wheel mounted to revolve upon said shaft, and means for securing said dial to said frame, substantially as described, whereby the shaft of the toothed Wheel may revolve in said dial when the latter is xed, or the dial maybe loosened to revolve on .said shaft.

2. The combination, with the toothed wheel A, the shaft a, secured therein and journaled in the frame B, the index or pointer II, secured on said shaft, the arm C, journaled on said shaft, the paWl e on said arm, adapted to engage the teeth of Wheel A, the lever E, the connecting-rod D, and the digital levers G, each pivoted near its center, to engage lever E, of the graduated dial I, concentric With shaft a., and the clamp `has and for the pur-` pose specified.

ALBERT KING BARMORE.

Nitnessesz J. I.. MCCALEB, J. L. Wiininin. 

